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Kronos AV
Kronos AV

Nagaoka R1 Balanced Armature In Ear Headphones
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  • Regular price £539.00
  • Available Worldwide Shipping

The R1 is the worlds first balanced armature type earphone to use Ruby as an Acoustical Filter. It is as impressive in performance as it is in aesthetics and design.

The extremely hard material Ruby, used as an acoustic filter greatly suppresses stray resonances within the unit to provide an incredible depth and clarity across the frequency spectrum. It gives a sound stage and dynamic range never heard before in a canal type earphone.

The R1 comes with mulitple silicon ear pieces and beautifully crafted genuine leather pouch to carry your priced possession around.

  •  TYPE: Canal type 
  • Driver: Balanced armature type
  •  Output sound pressure level: 113 dB / 1 kHz / 1 mW / 
  • Reproduction frequency band: 4 ~ 90,000 Hz / 
  • Maximum input: 20 mW / 
  • Impedance: 31 Ω
  •  Weight: 8 g (without cord)
  •  Code specification: 1.2 m (Y type) 4N OFC silver plating / 
  • Plug part: L type Φ 3.5 mm 3 pole mini plug (gold plating)
  •  accessories:  Silicone earpiece (S / M / L) /
  • Compliment form earpiece (T-400L) / 
  • Domestic cowhide made storage pouch / 
  • Replacement auricle prevention filter exchange kit /
  • Cosmetic box: Retractable box (BLACK) With sleeve / 
  • Japanese Instruction Manual

We are still delivering orders as normal. When your order ships you will still receive tracking details. For UK shipments, Our couriers have procedures in place to ensure deliveries are arriving as quickly & safely as possible. Drivers can now sign for your parcels, however will notify you that they have arrived, in order to ensure you receive your parcel. Signing for the parcel has now been stopped temporally for hygiene reasons. Drivers are also working with customer instructions, so you can ask them to leave the parcel in a safe place (doorstep etc...) if you prefer not to come into direct contact with the driver.

There has been no changes to deliveries with Brexit. All deliveries to the UK mainland, Northern Ireland and the Republic of Ireland are operating as normal. No VAT or charges are applicable. 

Express Deliveries

Express Delivery is FREE on all orders over £50. Express Delivery offers delivery in 24-72 hours from time of purchase. We use premium couriers for this service, mainly DPD & Royal Mail. DPD will offer you a one hour window for delivery to make sure someone is at home, or you can reschedule the delivery if no one is around. 

Standard Deliveries

Here at Kronos AV, we have vast experience with e-commerce sales. Making sure that your parcel arrives undamaged is a huge priority for us. That’s why at Kronos AV, we only use premium couriers for all our orders. All our parcels are shipped with DPD or Royal Mail and are always sent Signed For to make sure it gets to the right person. 

If for any reason your parcel does arrived damaged, please get in touch, and we will be happy to get everything resolved for you. We are always on hand to help!


Delivery is FREE on all orders over £50. In order to offer FREE delivery to UK customers, we use several premium couriers to ensure your delivery arrives safe.

Most large orders (over 2kg) ship using DPD or DHL courier and smaller orders (under 2kg) by Royal Mail signed for services.

The most appropriate courier will be chosen for the items ordered to ensure the quickest possible delivery.

We can offer very generous trade in offers across the majority of our product range. 

Why not ask and see how much you HiFi is worth!

To find out how much your HiFi is worth... Click Here

If you have any question, please feel free to call us on 03435236169 or email